\begin{tabular}{l*{11}{c}}
\hline
                 &\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}\\         &\multicolumn{1}{c}{4}&\multicolumn{1}{c}{5}&\multicolumn{1}{c}{6}&\multicolumn{1}{c}{7}&\multicolumn{1}{c}{8}&\multicolumn{1}{c}{9}&\multicolumn{1}{c}{10}&\multicolumn{1}{c}{11}&\multicolumn{1}{c}{12}&\multicolumn{1}{c}{13}&\multicolumn{1}{c}{14}\\ \hline  \emph{Second stage}\\
Enrollment  &       0.108** &       0.023   &      -0.042   &      -0.045   &       0.025   &       0.044   &       0.064   &       0.070   &       0.036   &       0.095*  &       0.048   \\
            &     (0.054)   &     (0.053)   &     (0.056)   &     (0.056)   &     (0.051)   &     (0.056)   &     (0.053)   &     (0.053)   &     (0.051)   &     (0.048)   &     (0.048)   \\
\hline
Controls    &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   \\
F-stat      &         241   &         241   &         241   &         241   &         241   &         241   &         241   &         241   &         241   &         241   &         241   \\
N           &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   &        3784   \\
Mean of Y   &        0.62   &        0.66   &        0.64   &        0.62   &        0.61   &        0.61   &        0.60   &        0.59   &        0.60   &        0.60   &        0.60   \\
\hline
\end{tabular}
